JPS5743238A - Microprocessor - Google Patents

Microprocessor

Info

Publication number
JPS5743238A
JPS5743238A JP55118722A JP11872280A JPS5743238A JP S5743238 A JPS5743238 A JP S5743238A JP 55118722 A JP55118722 A JP 55118722A JP 11872280 A JP11872280 A JP 11872280A JP S5743238 A JPS5743238 A JP S5743238A
Authority
JP
Japan
Prior art keywords
current
flow
circuit
function circuit
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP55118722A
Other languages
Japanese (ja)
Other versions
JPH0154722B2 (en
Inventor
Toshitaka Tsuda
Shigenori Baba
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP55118722A priority Critical patent/JPS5743238A/en
Publication of JPS5743238A publication Critical patent/JPS5743238A/en
Publication of JPH0154722B2 publication Critical patent/JPH0154722B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Microcomputers (AREA)
  • Power Sources (AREA)

Abstract

PURPOSE:To reduce the power consumption as a whole even in a high speed operation, by discriminating a used function circuit from a not used one in each instruction, etc. and controlling so as not to flow the current to the unused function circuit. CONSTITUTION:A decoder 1 interprets instructions and outputs a control signal in gate unit and recognizes the function circuit used for every instruction. Control is made so as not to flow the current to the unused functions e.g., the output is at ''1'' in case of the inverter. In case of addition, since the use or nonuse of an operation circuit is identified if the result of addition is set to a register 8, when it is identified as nonuse, control is made by the decoder 1 so as not to flow the current to each gate of a circuit 7.
JP55118722A 1980-08-28 1980-08-28 Microprocessor Granted JPS5743238A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55118722A JPS5743238A (en) 1980-08-28 1980-08-28 Microprocessor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55118722A JPS5743238A (en) 1980-08-28 1980-08-28 Microprocessor

Publications (2)

Publication Number Publication Date
JPS5743238A true JPS5743238A (en) 1982-03-11
JPH0154722B2 JPH0154722B2 (en) 1989-11-21

Family

ID=14743457

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55118722A Granted JPS5743238A (en) 1980-08-28 1980-08-28 Microprocessor

Country Status (1)

Country Link
JP (1) JPS5743238A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59196084A (en) * 1983-04-22 1984-11-07 Terumo Corp Device for treating blood
EP0171088A2 (en) * 1984-08-10 1986-02-12 Nec Corporation Microprocessor with execution unit independently put into standby condition
JPS62111323A (en) * 1985-11-11 1987-05-22 Oki Electric Ind Co Ltd Method for controlling signal processor
JPS62145418A (en) * 1985-12-20 1987-06-29 Nec Corp Control system for standby of alu
JPH05282075A (en) * 1992-03-30 1993-10-29 Nec Corp Microcomputer

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59196084A (en) * 1983-04-22 1984-11-07 Terumo Corp Device for treating blood
JPS6233872B2 (en) * 1983-04-22 1987-07-23 Terumo Corp
EP0171088A2 (en) * 1984-08-10 1986-02-12 Nec Corporation Microprocessor with execution unit independently put into standby condition
US5495617A (en) * 1984-08-10 1996-02-27 Nec Corporation On demand powering of necesssary portions of execution unit by decoding instruction word field indications which unit is required for execution
JPS62111323A (en) * 1985-11-11 1987-05-22 Oki Electric Ind Co Ltd Method for controlling signal processor
JPS62145418A (en) * 1985-12-20 1987-06-29 Nec Corp Control system for standby of alu
JPH05282075A (en) * 1992-03-30 1993-10-29 Nec Corp Microcomputer

Also Published As

Publication number Publication date
JPH0154722B2 (en) 1989-11-21

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